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Why There Are Different Colors of PCBs?

PCB color generally refers to the most visible oil color on a PCB board when received, and the color on the surface of the PCB is the color of the solder mask. PCB board dyeing pigment is a hardening resin, and the main resin is colorless and nearly transparent.

We print colors onto the PCB through screen printing. PCB colors include green, black, blue, yellow, purple, red, and brown. Some manufacturers have creatively developed PCBs in various colors such as white and pink. Now lets check why there are different colors.

1. Green

Green is the most popular color. Therefore, many people have always mistakenly believed that PCBs are green or most of them are green. Green increases the clarity of PCBs because green PCBs create a sharp contrast with white text, thereby enhancing readability. In addition, the surface treatment of green PCBs will reflect less light, which helps to reduce glare.


2. White

White look clean and tidy in various environments, becoming increasingly popular. However, due to the tendency of white PCBs to conceal wiring, white PCBs are still not the preferred choice. But the white PCB looks particularly contrasting in black screen printing.

3. Yellow

Previously, yellow PCBs were commonly used, but now they are not as practical. Yellow PCB can quickly meet different needs such as style, cleanliness, and visibility. The yellow PCB has an obvious drawback: poor contrast with wiring and screen printing.


4. Blue

The blue is considered a thick plate for labels because it provides significant screen printing contrast. This color is not as eye-catching as green PCB, black PCB, or white PCB, but blue is the preferred color for PCB because it provides an excellent aesthetic choice. It is better to install a blue PCB on an LCD because it does not produce sharp contrasting edges and bright background colors.


4. Red

Due to some advantages of red PCBs, many PCB manufacturers are enthusiastic about adopting red. The red PCB provides excellent visibility and clearly defines the contrast of traces, planes, and blank areas. The silk screen looks very beautiful against the backdrop of the red PCB.


5. Black

Black PCBs are equally popular as white PCBs. These two PCB colors produce low contrast, making it easy to label important components. However, the main drawback of black and white PCBs is that specific details may be focused and have small shadows. This shadow makes tracking difficult. Therefore, black PCBs should not be used in various high-temperature applications, as black PCBs may cause discoloration in screen printing. Moreover, black PCB boards are a mixture of cobalt and carbon, which may have poor conductivity.

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